/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com.spoxcy.servlet;

import com.spoxcy.business.IUserValidationService;
import com.spoxcy.business.UserValidationServiceImpl;
import com.spoxcy.po.LoginPO;
import com.spoxcy.util.DBUtil;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Denis.Duan
 *
 */
public class LoginValidationServlet extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        LoginPO login = new LoginPO();
        DBUtil dbUtility = (DBUtil)getServletContext().getAttribute("dbUtility");
        login.setUsername(request.getParameter("username"));
        login.setPassword(request.getParameter("password"));

        IUserValidationService validator = new UserValidationServiceImpl(dbUtility);
        
        if(validator.isExistingUser(login)){
            RequestDispatcher dispatcher = request.getRequestDispatcher("/WEB-INF/jsp/welcomeback.jsp");
            dispatcher.forward(request, response);
        }else{
            response.sendRedirect("index.html");
        }
        
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
